Uploaded November 2024 | Updated September 2026, 1 week ago
2003 was a year of changes, both for the industry and for myself: Apple released the first Power Mac G5 computers, I bought my first brand-new Apple computer, and I switched to the Mac.
I stared 2003 with my PC from college, which was running Gentoo Linux at the time. (Not knocking Gentoo today, but this was the era of having to install from a Stage 1 installer, which I didn't find sustainable.) And while I had ideas for upgrading my PC with a recently-announced (or at least recently-affordable) 800MHz FSB Pentium 4 processor, I also remember reading about the up-and-coming Mac OS X, which was based on BSD Unix.
That's one way to appeal to a Linux user, one having good memories of using Macs in middle and high school.
And being 2003, Power Mac 7500/7600 computers were available on eBay for rock-bottom prices. So I bought one so that I could run Mac OS. And to get the most out of this Mac, I even spent less than $40 (in 2003 dollars) for a G3 upgrade for that 7500/7600. But according to my email records, it wasn't long before I sold the 7500/7600 and the G3 upgrade, and with the proceeds bought a beige G3 tower.
I recently bought a Power Mac 7200 from a Facebook Marketplace seller for about $20, and it turned out to be a Power Mac 7500/7600 with a 7200's lid. And after that, I found a G3 upgrade card on eBay for about $100... it's looking like I have the components needed to rebuild the Power Mac I had for a few short months in 2003.
And better yet, I demonstrated in a livestream last week that the 233MHz G3 card I bought seems to run at 266MHz, which is the actual clock speed of the upgrade card I had back in 2003. Nostalgia!
Will I find an appropriate version of Mac OS to run on my 7500/7600? Will I find a compatible extension to enable the backside cache? Will this 233MHz card run stable at 266MHz? You'll have to watch to find out!
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: ko-fi.com/jdmcs
🈷️ Support me on Patreon: patreon.com/jdmcs
📦 Amazon Wishlist: jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: jdmcs.net/myblog
Follow me on Instagram: jdmcs.net/myinstagram
Follow me on Twitter: jdmcs.net/mytwitter
2003 was a year of changes, both for the industry and for myself: Apple released the first Power Mac G5 computers, I bought my first brand-new Apple computer, and I switched to the Mac.
I stared 2003 with my PC from college, which was running Gentoo Linux at the time. (Not knocking Gentoo today, but this was the era of having to install from a Stage 1 installer, which I didn't find sustainable.) And while I had ideas for upgrading my PC with a recently-announced (or at least recently-affordable) 800MHz FSB Pentium 4 processor, I also remember reading about the up-and-coming Mac OS X, which was based on BSD Unix.
That's one way to appeal to a Linux user, one having good memories of using Macs in middle and high school.
And being 2003, Power Mac 7500/7600 computers were available on eBay for rock-bottom prices. So I bought one so that I could run Mac OS. And to get the most out of this Mac, I even spent less than $40 (in 2003 dollars) for a G3 upgrade for that 7500/7600. But according to my email records, it wasn't long before I sold the 7500/7600 and the G3 upgrade, and with the proceeds bought a beige G3 tower.
I recently bought a Power Mac 7200 from a Facebook Marketplace seller for about $20, and it turned out to be a Power Mac 7500/7600 with a 7200's lid. And after that, I found a G3 upgrade card on eBay for about $100... it's looking like I have the components needed to rebuild the Power Mac I had for a few short months in 2003.
And better yet, I demonstrated in a livestream last week that the 233MHz G3 card I bought seems to run at 266MHz, which is the actual clock speed of the upgrade card I had back in 2003. Nostalgia!
Will I find an appropriate version of Mac OS to run on my 7500/7600? Will I find a compatible extension to enable the backside cache? Will this 233MHz card run stable at 266MHz? You'll have to watch to find out!
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: ko-fi.com/jdmcs
🈷️ Support me on Patreon: patreon.com/jdmcs
📦 Amazon Wishlist: jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: jdmcs.net/myblog
Follow me on Instagram: jdmcs.net/myinstagram
Follow me on Twitter: jdmcs.net/mytwitter

![The Flex 64K: I Should Have Kept My Mouth Shut During Wheel of Regrets™ (Computerized Start™ Live)
I meant to look at my Macintosh IIsi tonight, but Wheel of Regrets™ took over the stream...
Everything was going smoothly until someone made the comment about a clone computer that I had. And me, perplexed how they knew that I had bought another Apple ][ clone, didnt keep my mouth shut. Thats how the OS-21, a.k.a. the Flex 64K, took over the second half of the stream.
Did I get any Trident cards? What is the Flex 64K? And does it work? Youll have to watch to find out!
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: https://ko-fi.com/jdmcs
🈷️ Support me on Patreon: https://www.patreon.com/jdmcs
📦 Amazon Wishlist: https://jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: https://jdmcs.net/myblog
Follow me on Instagram: https://jdmcs.net/myinstagram
Follow me on Twitter: https://jdmcs.net/mytwitter The Flex 64K: I Should Have Kept My Mouth Shut During Wheel of Regrets™ (Computerized Start™ Live)](https://i.ytimg.com/vi/l9dvJ5o6D9I/mqdefault.jpg)








